Preparation of synthetic rutile from high titanium slag using microwave heating

ABSTRACT

In this work, we demonstrate a novel synthesis of synthetic rutile from high titanium slag. This rutile TiO₂ was obtained by a simple one-step microwave roasting route. The influence of microwave roasting temperature and duration on the phase transformation of high titanium slag has been assessed. X-ray diffraction (XRD) results indicate that the intensity of anosovite (Fe₃Ti₃O₁₀) phase, which were the major phase of high titanium slag of carbon thermal reduction of ilmenite ores, decreased rapidly while the peaks for rutile TiO₂ phase increased with increase in the microwave roasting temperature. The scanning electron microscope (SEM) images revealed formation and the particle-size distribution of rutile TiO₂ phase. Based on XRD and SEM analysis, confirmed the dependence of phase structure, composition and crystallite size on the process conditions of microwave roasting.

KEYWORDS:

• Microwave heating
• rutile TiO₂
• high titanium slag
• structural performances
• phase transformation

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

Financial supports from the National Scientific Foundation of China [grant number 51504110], [grant number 51404114]; Open Research Fund of State Key Laboratory of Multiphase Complex Systems [grant number MPCS-2017-D-05]; Specialized Research fund for the Doctoral Program of High Education [grant number 20125314120014] were sincerely acknowledged.